Fluid-pressure regulator.



W. V. TURNER.

FLUID PRESSURE REGULATOR.

2 SHEETS-SHEET 1.

jIW/AP 1m 8 9 n m 4 5 Wm Li. HM1\\ 2 A 7 m 2 5 (W/ 2 I 6 a a a 2 a a a 42 3 2 a o 2 4 a M o M mi i'ssls W. V. TURNER.

FLUID PRESSUEE REGULATOR. APPLICATION IYILBD 1'33. 13, 1906.

Patented Mar. 29, 1910.

2 BHEETB-SHEET 2.

. sure normally supp Application filed To all 'urhom. may concern:

Be it known that l, Wnnrnn V. Tonnes, a citizen of the United States,residing in Vvilkinsburg, the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inFluid-Pressure Regulators, of which the following is a specification. 5This invention relates to fluid pressure regulators, and has for itsobject to provide an improved valve mechanism for control- 1' ling thesupply of fluid from a source of. higher pressure to a pipe orcompartment in which it is desired to normally maintain the 1 pressureconstant at a predetermined lower i degree.

While thisimproveinent is adapted for 1 general use, it is particularlydesigned to be employed as a feed valve device in air brake systems forlimitin the degree of air presied from the main reser- 3 voir to thetrain brake pipe of the system, and comprises an improved valvemechanism adapted to more accurately regulate the pressure and to morerapidly supply or feed the train pipe pressure up to the predeterminedmaximum degree after a reduction has been made in the train pipepressure and communication from the main reservoir is 5 again openedthrough the feed valve to the i train pipe for restoring the normaldegree of pressure therein. It has heretofore been proposed. to employ amain valve operated by a piston or controlling the flow of liquid, andto govern the pressure on said iston y means of a regulating valveoperated by the opposing prespartment, or train pipe, and an adjustablespring, and the regulating valve has been v designed to control therelease of fluid from 5 one side of said. piston either to the com- Ipart-merit on the outlet side of the valve or to the atmosphere.

According to the preferred :lci'nrof my present ii'nprovement, I employa. movable abutment tor operating the main valve an govern the pressureupon the opposite faces i said sbut-i'nent or piston heads by any ll'lile Lit-21113, such as two regulatii valves i l the preside on rho trainpipe r0 side of the main 'valvef he said iriuin valve will sures of thefluid 1n the low pressure com.- I l ruary 13, 1.383.

5 outlet side 4 "it HE WEST- -Jl, LOEPORATION' 5:312217. life. 36a),

In the accompanying drawings, Figure 1- is a vertical section of apressure regulating alve device embodying my improvements; Fig. 2 an endelevation of the same, the lower portion of the casing containing one ofthe regulating valves being broken away to .more clearly show the springadjusting device; Fig. 3 a. detail view showing the adjusting wrench orhandle; Fig. 4 a side view, partly in elevation and partly in' section,showing a modified form of adjusting device; and Fig. 5 an end view ofthis moditicd structure with a part of the casing broken away.

According to the preferred construction as shown in Fig. 1, the fluidpressure regulator (bniprises a main valve 6, which is shown in the formof a slidevalve operating in the chamber 7 and controlling the outletport 8 communicating with the low pressure side or train pipe space 9,the valve chamber being'in open (761111! iication with the high pr orsource of supply or main reservoir through ge 10. v The main valve ispreferably operated by a movable abutmi-ant in the form o'f'two pistonheads 13 and lei, the inner or adjacent sides of which. are subject tothe pressure of the valve chamber 7, while the outer or op respectiveregulating valves 19 and 18.

Any suitable means may be used for controlling the pressure in saidchambers ac the variation of pressure on the of the valve device, but Iprefer to employ a diaphrag'n'i 20, subject on one side to the pressurein diaphragm chamber which communicates by passage 3?; with the outletpre which it desirei,

cording to an initil the desired deto engage the regulating valve 19 andalso having a stem 23 extending out through the adjusting nut 24 andadapted to engage at certain positions with the stem 28 of regulatingvalve 18.

The main valve 6 is normally held in its wide open position by means ofspring-17, as indicated in Fig. 1, when the pressure upon the oppositefaces of the pistons is equalized. The piston heads 13 and 14 may be ofthe same size, but are here shown as of slightly different diameters, inorder to facilitate the assembling of the parts. Fluid under pressurebeing supplied through. inlet 10 to the valve chamber 7 it leaks aroundpiston heads 13 and 14 to the chambers 12 and 11, and as the regulatingvalve 18 is closed the pressure in the chamber 11 will be equal to thatin valve chamber 7 The spring 22 being adjusted to the desired degree ofoutlet pressure to be maintained presses on diaphragm 2O and-opensregulating valve 19, so .that fluid which leaks around piston 13 tochamber-12'is released or permitted to flow through chamber 21 andpassage 33 to the outlet passage 9. The mainvalve then remains wide openand fluid flows rapidly through port 8 to the outlet 9 communicatingwith the compartment or pipe in which it is desired to maintain acertain maximum degree of pressure. As the pressure rises in this outletpassage, and consequently in the diaphragm chamber 21, to nearly equalthat 3 for which the spring 22 is adjusted, the diaphragm is moved outagainst its spring thereby permitting the regulating valve 19 to close.

' chamber 12 to equal that in the valve chamton acts to move the slidevalve 6 to close the supply port 8. I

As long as the pressure upon the outlet side and on the diaphragmremains at the desired maximum degree, there is a slight ilovv' ofcompressed fluid from chamber 11 to the atmosphere, so that the greaterpressure on the opposite face of the piston holds .the main valveclosed. As soon as the outlet pressure is diminished by leakage orotherwise, the spring 22 moves the stem 23 to permit the valve 18 toclose. The pressure will then equalize aroundthe piston 14 and thespring 17 will tend to open the main valve. Should there be any tendencyof the The pressure then accumulates in main valve and pistons to stickand not open promptly, a very slight further movement of the diaphragmunder spring 22 acts to open the regulating valve 19, causing a ventingofthe pressure from chamber 12 i on the outer face of piston 13 and aprompt and positive opening movement of the main valve. It will beapparent, therefore, that my improved device will operate quite wellwithout the spring 17 and that the same may be dispensed with, ifdesired.

Bythe use of the diaphragm and regulating valve mechanism forcontrolling the pressure upon the outer faces of the movable abu-tmentor piston heads 13 and 14, a prompt and positive action of the mainvalve is insured in both its opening and closing movements.

When used as a, feed valve in air brake systems, it is often desirableto adjust the spring 22 from one certain pressure to another, as for atrain pipe pressure of pounds persquare inch in or inary braking and 110pounds per square inch in brak- .ing for high speed trains, and order to'two friction bands 29 and 30, mounted on the casing 34 and havingprojections 31 and 32 respectively. The adjustingnut24is provided withpolygonal head, preferableight sided, to allow for small angular adjustments, on which is mounted a small wrench 25 having a bent handle 26for engaging theprojections or stops 31 and 32 on the friction bands. Anut 27 may hold the wrench in place. v a

The frictionbands-are clamped onto the casing sufficiently tight toprevent accidental displacement, but may be shifted around by tappingthe projections with a hammer or other implement, to such positions asto give the desired adjustment to the spring 22 when the handle 26 isturned to engage one or the other of said projections 31 or $32 of therespective friction bands.

Other means may be devised for limiting the adjustment of nut 24 toeither of two positions, as shown, for instance, in Figs. 4 and 5 of thedrawings. According to this construction, the wrench is made in the formof a hand wheel 37 and is adapted to engage an adjustable stop ring 35having lock nut 36 mounted on casing 34, and in the opposite directionmay engage a stop pin 38 adjustably supported on the valve casing andhaving a lock nut 3;). It will now be evident that the adjustable stopsmay be readily set in such positions as limit the adjustment of nut 24in its extreme positions regulator for either class of service.

ensues governed by the fluid on the out-let pressure for controlling therel use from oppositefoees of said moveble abutment.

2. A fluid pressure regulator comprising main valve means, a. pistonnormally subject on opposite sides to equal. pressures for opening andMpiston normmly subject on opposite sidesto equal pressures crsing saidvalve means, and mechunisn QOVel ed by the outlet pressure for conrolling the pressure acting on said pistons.

A fluid pressure regulator comprising initili valve means, a piston foropening and ,e' piston for closing sue? valve means, said oistons havingmeans for normally equalizing the fluid pressi'u'e on opposite sides andregulating valve mechanismgoverned by the outlet pressure forcontrolling the release of fluid from one face of each or said pistons,to actuate saidvulve means.

l. A liuid pressure regulator comprising a main vslve, pistons subjectto fluid pressure on one oi? their faces for operating said valve, andreguleting mechanism governed by the outlet pressure for controlling therelease of iiuid under pressure from. the opposite faces of saidpistons, to thereby e.ctu-. ate said main valve.

5. It fluid pressure regulator comprising at main valve, pistons subjecton one side to the pressure of the valve chamber for operating saidvalve, means for permitting a slow leakage of fluid past said pistons,and regulating mechanism for controlling the release of fluid from thechambers on the opposite feces of said pistons.

6. A fluid pressure regulator comprising a main valve, pistons subjecton one side to the pressure of the valve chamber for opersting saidvalve, .means for permitting; t; slow leakage of fluid pastiseidpistonsg' s regulating valve for venting fluid from Lill e opposite sideof one piston to the low pressure compsrtmen't, another regulating vulvefor venting fluid from the opposite side of the; other piston to theatmosphere, .ond means governedby the outlet pressure for actuatingtheregiflsting valves.

"7. In. a fluid pressure regulator, the e "nbination with a main valveand move.v le abutment for operating the some, of e regueating andadjusting nut for. said sprii leting valve for controlling the pressureon one toes of said abutment, another regulating valve for controllingthe pressure on an opposite ioce oft sold abutment, and e diuphragnisubject to the outlet pressure for actuating seid regulating; valves.

8. A iiuid pressure regulator comprising a main slide valve normallyheld to its seat by the inlet pressure, a. movable ubutment subject tothe inlet pressure for operating said slide valve, and regulating valveinechanism governed by the outlet pressure for controlling the releaseof fluid from opposite feces of said abutment.

A fluid pressure regulator comprising at main valve, pistons subject tothe inlet pressure for operating said valve, regulatlIig"'ViliVGS forcontrolling the release of fluid from the opposite feces oi? saidpistons, a diaphragm subject to the outlet pressure for actuating suidregulating valves, erredjusteble spring, end-adjustable stops forlimiting the renge'offadjustment of said sprin ll). it. fluid pressureregulator comprising a valve for controlling the flow of fluid, meanssub ect to the fluid pressure on one i side of an, adjustable spring onthe other for controlling the action of said valve, a

, 2 two rriction bands mounted on the casing and each having aprojection or stop, and en arm carried by the adjusting nut for engagingsaid stops.

11. A fluid pressure regulator comprising u main valve, a movableabutment for opersting said valve means tending to maintain the fluidpressure on said abutment in equi librium, valve means governed by theoutlet or low pressure for controlling the pressure on .one side of saidabutment to actuate the some, and additional means, operated by saidpressure controlling means, for also actuating seid abutment.

12. A fluid pressure regulator comprising a, valve for controlling theflow of fluid, means, subject to the fluid pressure on one side and anadjustable spring on the other, for controlling the action of saidvalve, and adjustable" stops, having a. relative movement to each other,for limiting the mugs of adjustment of said spring. I

In testimony whereof I have hereunto set my hand.

WALTER V. TURNE R.

